Double pipe connection on plastic pipes

Abstract

A double pipe connection is provided having a one-piece gasket (5), which extends sealingly into an intermediate space (1c) of one pipe end (1a) with an internal, transversely extending wall (5c), on one hand, and, also sealingly surrounds a partition (2c) of the other pipe end (2a), on the other hand. The two pipe ends (1a and 2a) are inserted into each other in the axial direction, and are held together with a locking bar (6) in a positive-locking manner. The cross section of the pipe connection may be non-round, e.g., rectangular. Since the pipe ends have no flanges and outer threads, they may be cut to any length, and shaping suitable for injection molding is possible. The double pipe connection is particularly suitable for liquid-bearing pipes on sanitary devices, e.g., drain fittings for wash stands.

What is claimed is: 
     
       1. A double pipe connection for connecting pipes comprising: a one piece outer double pipe being divided into two channels;   an inner pipe having two channels fixedly connected to one another and, said inner pipe channels having an intermediate space therebetween;   a gasket fittable inside said outer pipe, said gasket having a partition, said gasket partition extending into said intermediate space, said outer double pipe is divided by an inner wall, said gasket having a circumferential wall being in sealing contact with the inside of the outer pipe and being in sealing contact with the outside of the inner pipe, said gasket partition having one end defining a cavity, said outer double pipe inner wall extending into said gasket partition cavity.   
     
     
       2. A double pipe connection according to claim 1, wherein: said inner pipe channels have a contacting surfaces at said intermediate space, said gasket partition being in sealing contact with said contact surfaces.   
     
     
       3. A double pipe connection according to claim 1, wherein: said circumferential wall and said partition have sealing lips being in contact with the outside of the inner pipe.   
     
     
       4. A pipe connection, comprising: a first pipe having two channels separated by an intermediate space;   a one piece second pipe being divided into two channels by an inner wall;   a gasket having a circumferential wall and a partition, said gasket circumferential wall being fittable over said first pipe and said partition being fittable into said intermediate space, said gasket partition having a forward end defining a cavity, said inner wall extending into said cavity, said circumferential wall being fittable into said second pipe.   
     
     
       5. A double pipe connection for connecting pipes comprising: an outer pipe;   an inner pipe having two channels, said inner pipe channels having an intermediate space therebetween;   a gasket fittable inside said outer pipe, said gasket having a partition, said gasket partition extending into said intermediate space;   a locking bar, said locking bar being inserted into said intermediate space and being attached to said outer pipe thereby fixedly connecting said inner pipe to said outer pipe.   
     
     
       6. A double pipe connection according to claim 5, wherein: said outer pipe includes two diagonally opposite extension pieces having recesses, said locking bar having ends which extend into said extension pieces recesses.   
     
     
       7. A pipe connection according to claim 5, wherein: said outer pipe is stepwise expanded toward its opening.   
     
     
       8. A pipe connection according to claim 5, wherein: said inner pipe end and said outer pipe end have rectangular cross sections.   
     
     
       9. A pipe connection according to claim 5, wherein: said inner pipe is a connection piece of a sanitary device drain fitting.   
     
     
       10. A pipe connection according to claim 9, wherein: said sanitary device is a wash basin.   
     
     
       11. A pipe connection according to claim 10, wherein: said inner pipe is an overflow pipe a first of said inner pipe channels being arranged above a second of said channels being a return channel, each of said inner pipe channels having a horizontal portion adjacent said outer pipe and a vertical section connected to said horizontal section, said rising channel vertical section being open to said return channel vertical section at an upper end.